Add remaining logical functions: and, bool, false, true, not, or

[SteveL-MSFT]

PR Summary

Implement all the remaining logical functions: and(), bool(), false(), true(), not(), or()

PR Context

Part of #976

[Copilot]

Pull Request Overview

This PR implements six remaining logical functions for the DSC function library: and(), bool(), false(), true(), not(), and or(). These functions provide essential boolean operations and type conversions to support logical expressions in DSC configurations.

• Adds logical operators (and, or, not) that accept boolean arguments and perform standard logical operations
• Adds boolean constants (true, false) that return fixed boolean values without arguments
• Adds a type conversion function (bool) that converts strings and numbers to boolean values
• Updates module registration and localization to support all new functions
• Includes comprehensive test coverage for all implemented functions

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
dsc_lib/src/functions/and.rs	Implements logical AND function with support for multiple boolean arguments
dsc_lib/src/functions/or.rs	Implements logical OR function with support for multiple boolean arguments
dsc_lib/src/functions/not.rs	Implements logical NOT function for single boolean argument
dsc_lib/src/functions/bool.rs	Implements boolean conversion from strings ("true"/"false") and numbers (0/non-zero)
dsc_lib/src/functions/true.rs	Implements constant function returning boolean true
dsc_lib/src/functions/false.rs	Implements constant function returning boolean false
dsc_lib/src/functions/mod.rs	Registers all new logical functions in the function dispatcher
dsc_lib/locales/en-us.toml	Adds localized descriptions and messages for all new functions
dsc/tests/dsc_expressions.tests.ps1	Adds comprehensive integration tests for all logical functions